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(node:21216) UnhandledPromiseRejectionWarning: Error: Cannot find module 'ajv/dist/compile/codegen'

• loader.js:815 Function.Module._resolveFilename internal/modules/cjs/loader.js:815:15

• loader.js:667 Function.Module._load internal/modules/cjs/loader.js:667:27

• loader.js:887 Module.require internal/modules/cjs/loader.js:887:19

• helpers.js:74 require internal/modules/cjs/helpers.js:74:18

• typeof.js:3 Object. [front]/[mini-css-extract-plugin]/[ajv-keywords]/dist/definitions/typeof.js:3:19

• loader.js:999 Module._compile internal/modules/cjs/loader.js:999:30

• loader.js:1027 Object.Module._extensions..js internal/modules/cjs/loader.js:1027:10

• loader.js:863 Module.load internal/modules/cjs/loader.js:863:32

• loader.js:708 Function.Module._load internal/modules/cjs/loader.js:708:14

• loader.js:887 Module.require internal/modules/cjs/loader.js:887:19

(node:21216) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag --unhandled-rejections=strict (see .html#cli_unhandled_rejections_mode). (rejection id: 1) (node:21216) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

(node:21216) UnhandledPromiseRejectionWarning: Error: Cannot find module 'ajv/dist/compile/codegen'

• loader.js:815 Function.Module._resolveFilename internal/modules/cjs/loader.js:815:15

• loader.js:667 Function.Module._load internal/modules/cjs/loader.js:667:27

• loader.js:887 Module.require internal/modules/cjs/loader.js:887:19

• helpers.js:74 require internal/modules/cjs/helpers.js:74:18

• typeof.js:3 Object. [front]/[mini-css-extract-plugin]/[ajv-keywords]/dist/definitions/typeof.js:3:19

• loader.js:999 Module._compile internal/modules/cjs/loader.js:999:30

• loader.js:1027 Object.Module._extensions..js internal/modules/cjs/loader.js:1027:10

• loader.js:863 Module.load internal/modules/cjs/loader.js:863:32

• loader.js:708 Function.Module._load internal/modules/cjs/loader.js:708:14

• loader.js:887 Module.require internal/modules/cjs/loader.js:887:19

(node:21216) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag --unhandled-rejections=strict (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 1) (node:21216) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

• javascript
• node.js
• vue.js
• webpack
• quasar-framework

Share Improve this question Follow asked Nov 18, 2021 at 12:42 MicessienMicessien 85011 gold badge66 silver badges88 bronze badges 1

• 3 The problem seems to be in mini-css-extract-plugin somewhere between version 2.4.3 and 2.4.5. Reverting mini-css-extract-plugin to 2.4.2 fixes it for now. npm i [email protected] --save-exact – Ted Chirvasiu Commented Dec 6, 2021 at 10:54

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10 Answers 10

Sorted by: Reset to default 150

I had the same issue when I used JHipster, which I solved by running this command

npm install --save-dev ajv@^7 

Thanks to this answer

I found that my package-lock.json file was imposing constraints that meant npm couldn't sort things out.

Firstly, I used npm ls ajv very helpful in illustrating where the dependencies were coming from (thanks @Greg Trevellick).

The solution for me, possibly a little drastic, was to remove the package-lock.json file and the node_modules directory and reinstall.

rm -rf package-lock.json node_modules
npm install

I faced this issue. Following these methods I was able to resolve the issue.

type and enter

 npm install ajv@latest ajv-keywords@latest

Issue fixed,

I just hit the same error several times recently. In my case the error was based on ajv-keywords and ajv-formats plugin incompatibility with node js 8 and 12 (legacy project).

To analyse the problem, you can always use the npm ls ajv command, to see, which module try to use something incompatible.

Personally, I spent days to figure out the right combination for ajv schema, node and ajv plugins to make them work together properly. (In my case, I used ajv 6.4.x, what I had to downgrade to 6.12, then I used [email protected] and [email protected] which I had to dowgnrade to 3.0 and 1.4)

This recently occurred for me and I have legacy-peer-deps=true in my .npmrc file and I removed that and deleted my node_modules and package-lock.json and it all worked after that

npm ls ajv
npm install --save-dev ajv@^8 

This worked for me. Thanks!

Remove your node_modules and package-lock.json file and run:

npm cache clear -f

Than reload or restart your code editor and run:

npm ls ajv
npm install

if this command throw error than try with

npm install --legacy-peer-deps    

First, you need to run npm ls ajv to output the required ajv version, and the output should be similar to

└─┬ [email protected]
  ├─┬ @eslint/[email protected]
  │ └── [email protected] deduped
  └── [email protected]

In this example, you need to install version 6.12.6

npm install --save-dev ajv@^6.12.6

Add "ajv": "^7" in package.json. Will work. enter image description here

Cannot find module 'ajv/dist/compile/codegen' Require stack:

• E:\react projects\signup\signupform\node_modules\ajv-keywords\dist\definitions\typeof.js
• E:\react projects\signup\signupform\node_modules\ajv-keywords\dist\keywords\typeof.js
• E:\react projects\signup\signupform\node_modules\ajv-keywords\dist\keywords\index.js
• E:\react projects\signup\signupform\node_modules\ajv-keywords\dist\index.js
• E:\react projects\signup\signupform\node_modules\schema-utils\dist\validate.js
• E:\react projects\signup\signupform\node_modules\schema-utils\dist\index.js
• E:\react projects\signup\signupform\node_modules\webpack-dev-server\lib\Server.js
• E:\react projects\signup\signupform\node_modules\react-scripts\scripts\start.js

npm ls ajv
npm install --save-dev ajv@^8

The above code works for me. Thanks!

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